There is a difference between the left and right side. They follow the curve of the hood and windshield. They are not parallel to each other. There is also a slight curve that follows the body.
You could have the metal laser cut and then give it the correct curve. I broke one of mine taking it off. those are cast AL and really brittle. I SS one would be cool. Probably would have to use screws rather than the pegs to secure it.